This paper introduces a new generic approach to the second stage of the assessment of the potential for building damage associated with major tunnelling projects in urban areas. The generic methodology has been developed to improve the effectiveness and efficiency of the process whilst maintaining consistency with the 3 phase assessment methodology outlined by Mair et al. (1996). The aim is to reduce the effort expended in producing a large numbet of Phase 2 calculation reports for individual buildings which show, in mosecases,that potential damage is within acceptable limits. Implementation of the new method will enable resources to be targeted at more problematic areas in Phase 3. As an example the paper presents a study of a typical 3km long section of twin running tunnel; it is shown that the generic assessment alone is sufficient to conclude thatno unacceptable damage will occur. For the section of running tunnels presented, one figure replaces several hundred individual building assessment reports. The generic methodology therefore reduces significantly the cost of potential building damage assessment.
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Ruang Koleksi Umum
Rak; 2